Annual rings are seen in temperate-zone trees because

Name: Annual rings are seen in temperate-zone trees because
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Annual rings are seen in temperate-zone trees because the size of the xylem cells varies with season. During the growing season, the xylem cells are larger, resulting in lighter colored wood. During the dormant season, the xylem cells are smaller, resulting in darker colored wood. The contrast between the lighter and darker wood creates the annual rings.

Annual Rings Are Seen in Temperate-Zone Trees Because